(self)
| 51 | ) |
| 52 | |
| 53 | def test_expressions(self): |
| 54 | author = Author.objects.annotate(backward=Reverse(Trim("name"))).get( |
| 55 | pk=self.john.pk |
| 56 | ) |
| 57 | self.assertEqual(author.backward, self.john.name[::-1]) |
| 58 | with register_lookup(CharField, Reverse), register_lookup(CharField, Length): |
| 59 | authors = Author.objects.all() |
| 60 | self.assertCountEqual( |
| 61 | authors.filter(name__reverse__length__gt=7), [self.john, self.elena] |
| 62 | ) |
| 63 | self.assertCountEqual( |
| 64 | authors.exclude(name__reverse__length__gt=7), [self.python] |
| 65 | ) |